refs #6089 suppress table def changed in error log

git-svn-id: file:///svn/mysql.com/mysql-5.5.30@54778 c7de825b-a66e-492c-adef-691d508d4ae1
refs #6089 fix mysql bug 47719 for show engine stauts to be able to propagate error

git-svn-id: file:///svn/mysql.com/mysql-5.5.30@54779 c7de825b-a66e-492c-adef-691d508d4ae1
#39 hot optimize table